Add comprehensive library expansion with new components and demos

- Add new libraries: ui-accessibility, ui-animations, ui-backgrounds, ui-code-display, ui-data-utils, ui-font-manager, hcl-studio
- Add extensive layout components: gallery-grid, infinite-scroll-container, kanban-board, masonry, split-view, sticky-layout
- Add comprehensive demo components for all new features
- Update project configuration and dependencies
- Expand component exports and routing structure
- Add UI landing pages planning document

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

projects/ui-code-display/node_modules/prismjs/plugins/diff-highlight/prism-diff-highlight.min.css

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+pre.diff-highlight>code .token.deleted:not(.prefix),pre>code.diff-highlight .token.deleted:not(.prefix){background-color:rgba(255,0,0,.1);color:inherit;display:block}pre.diff-highlight>code .token.inserted:not(.prefix),pre>code.diff-highlight .token.inserted:not(.prefix){background-color:rgba(0,255,128,.1);color:inherit;display:block}